Spell default packedgitlimit slightly differently
[git/git.git] / git-compat-util.h
1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
3
4 #ifndef FLEX_ARRAY
5 #if defined(__GNUC__) && (__GNUC__ < 3)
6 #define FLEX_ARRAY 0
7 #else
8 #define FLEX_ARRAY /* empty */
9 #endif
10 #endif
11
12 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
13
14 #if !defined(__APPLE__) && !defined(__FreeBSD__)
15 #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */
16 #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */
17 #endif
18 #define _GNU_SOURCE
19 #define _BSD_SOURCE
20
21 #include <unistd.h>
22 #include <stdio.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25 #include <stddef.h>
26 #include <stdlib.h>
27 #include <stdarg.h>
28 #include <string.h>
29 #include <errno.h>
30 #include <limits.h>
31 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <dirent.h>
34 #include <sys/time.h>
35 #include <time.h>
36 #include <signal.h>
37 #include <sys/wait.h>
38 #include <fnmatch.h>
39 #include <sys/poll.h>
40 #include <sys/socket.h>
41 #include <assert.h>
42 #include <regex.h>
43 #include <netinet/in.h>
44 #include <netinet/tcp.h>
45 #include <arpa/inet.h>
46 #include <netdb.h>
47 #include <pwd.h>
48 #include <grp.h>
49
50 #ifndef NO_ICONV
51 #include <iconv.h>
52 #endif
53
54 /* On most systems <limits.h> would have given us this, but
55 * not on some systems (e.g. GNU/Hurd).
56 */
57 #ifndef PATH_MAX
58 #define PATH_MAX 4096
59 #endif
60
61 #ifdef __GNUC__
62 #define NORETURN __attribute__((__noreturn__))
63 #else
64 #define NORETURN
65 #ifndef __attribute__
66 #define __attribute__(x)
67 #endif
68 #endif
69
70 /* General helper functions */
71 extern void usage(const char *err) NORETURN;
72 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
73 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
74 extern void warn(const char *err, ...) __attribute__((format (printf, 1, 2)));
75
76 extern void set_usage_routine(void (*routine)(const char *err) NORETURN);
77 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
78 extern void set_error_routine(void (*routine)(const char *err, va_list params));
79 extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
80
81 #ifdef NO_MMAP
82
83 #ifndef PROT_READ
84 #define PROT_READ 1
85 #define PROT_WRITE 2
86 #define MAP_PRIVATE 1
87 #define MAP_FAILED ((void*)-1)
88 #endif
89
90 #define mmap git_mmap
91 #define munmap git_munmap
92 extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset);
93 extern int git_munmap(void *start, size_t length);
94
95 #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024)
96
97 #else /* NO_MMAP */
98
99 #include <sys/mman.h>
100 #define DEFAULT_PACKED_GIT_WINDOW_SIZE \
101 (sizeof(void*) >= 8 \
102 ? 1 * 1024 * 1024 * 1024 \
103 : 32 * 1024 * 1024)
104
105 #endif /* NO_MMAP */
106
107 #define DEFAULT_PACKED_GIT_LIMIT \
108 ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256))
109
110 #ifdef NO_SETENV
111 #define setenv gitsetenv
112 extern int gitsetenv(const char *, const char *, int);
113 #endif
114
115 #ifdef NO_UNSETENV
116 #define unsetenv gitunsetenv
117 extern void gitunsetenv(const char *);
118 #endif
119
120 #ifdef NO_STRCASESTR
121 #define strcasestr gitstrcasestr
122 extern char *gitstrcasestr(const char *haystack, const char *needle);
123 #endif
124
125 #ifdef NO_STRLCPY
126 #define strlcpy gitstrlcpy
127 extern size_t gitstrlcpy(char *, const char *, size_t);
128 #endif
129
130 extern void release_pack_memory(size_t);
131
132 static inline char* xstrdup(const char *str)
133 {
134 char *ret = strdup(str);
135 if (!ret) {
136 release_pack_memory(strlen(str) + 1);
137 ret = strdup(str);
138 if (!ret)
139 die("Out of memory, strdup failed");
140 }
141 return ret;
142 }
143
144 static inline void *xmalloc(size_t size)
145 {
146 void *ret = malloc(size);
147 if (!ret && !size)
148 ret = malloc(1);
149 if (!ret) {
150 release_pack_memory(size);
151 ret = malloc(size);
152 if (!ret && !size)
153 ret = malloc(1);
154 if (!ret)
155 die("Out of memory, malloc failed");
156 }
157 #ifdef XMALLOC_POISON
158 memset(ret, 0xA5, size);
159 #endif
160 return ret;
161 }
162
163 static inline void *xrealloc(void *ptr, size_t size)
164 {
165 void *ret = realloc(ptr, size);
166 if (!ret && !size)
167 ret = realloc(ptr, 1);
168 if (!ret) {
169 release_pack_memory(size);
170 ret = realloc(ptr, size);
171 if (!ret && !size)
172 ret = realloc(ptr, 1);
173 if (!ret)
174 die("Out of memory, realloc failed");
175 }
176 return ret;
177 }
178
179 static inline void *xcalloc(size_t nmemb, size_t size)
180 {
181 void *ret = calloc(nmemb, size);
182 if (!ret && (!nmemb || !size))
183 ret = calloc(1, 1);
184 if (!ret) {
185 release_pack_memory(nmemb * size);
186 ret = calloc(nmemb, size);
187 if (!ret && (!nmemb || !size))
188 ret = calloc(1, 1);
189 if (!ret)
190 die("Out of memory, calloc failed");
191 }
192 return ret;
193 }
194
195 static inline void *xmmap(void *start, size_t length,
196 int prot, int flags, int fd, off_t offset)
197 {
198 void *ret = mmap(start, length, prot, flags, fd, offset);
199 if (ret == MAP_FAILED) {
200 release_pack_memory(length);
201 ret = mmap(start, length, prot, flags, fd, offset);
202 if (ret == MAP_FAILED)
203 die("Out of memory? mmap failed: %s", strerror(errno));
204 }
205 return ret;
206 }
207
208 static inline ssize_t xread(int fd, void *buf, size_t len)
209 {
210 ssize_t nr;
211 while (1) {
212 nr = read(fd, buf, len);
213 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
214 continue;
215 return nr;
216 }
217 }
218
219 static inline ssize_t xwrite(int fd, const void *buf, size_t len)
220 {
221 ssize_t nr;
222 while (1) {
223 nr = write(fd, buf, len);
224 if ((nr < 0) && (errno == EAGAIN || errno == EINTR))
225 continue;
226 return nr;
227 }
228 }
229
230 static inline int has_extension(const char *filename, const char *ext)
231 {
232 size_t len = strlen(filename);
233 size_t extlen = strlen(ext);
234 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
235 }
236
237 /* Sane ctype - no locale, and works with signed chars */
238 #undef isspace
239 #undef isdigit
240 #undef isalpha
241 #undef isalnum
242 #undef tolower
243 #undef toupper
244 extern unsigned char sane_ctype[256];
245 #define GIT_SPACE 0x01
246 #define GIT_DIGIT 0x02
247 #define GIT_ALPHA 0x04
248 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
249 #define isspace(x) sane_istest(x,GIT_SPACE)
250 #define isdigit(x) sane_istest(x,GIT_DIGIT)
251 #define isalpha(x) sane_istest(x,GIT_ALPHA)
252 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
253 #define tolower(x) sane_case((unsigned char)(x), 0x20)
254 #define toupper(x) sane_case((unsigned char)(x), 0)
255
256 static inline int sane_case(int x, int high)
257 {
258 if (sane_istest(x, GIT_ALPHA))
259 x = (x & ~0x20) | high;
260 return x;
261 }
262
263 #endif